Crypto has only existed in this funny money monetary environment. Good chance it all collapses if interest rates are too high by the time of the next BTC halvening (iirc around mid 2024) and there aren't enough bids to perpetuate the "next cycle will be bigger than the last" pattern.
But at the same time, its also true that the awful central bank management that prompted the creation of BTC is also at its peak awfulness right now.
So really, wait and watch.
https://en.wikipedia.org/wiki/Greater_fool_theory
It made me sell all my crypto (luckily at a profit), and I have not looked back.
In general, anything that turns a raw material of some sort into a more refined product (be it iron ore into steel, steel into machines, or electrons into advertisements) is adding economic value into the system. By doing that work, the total net wealth of humanity increases. The economy is positive-sum, and so investing in anything that's correlated with the economy as a whole should be worthwhile.
Bitcoin doesn't work that way. Trading Bitcoin isn't adding to the total net worth of humanity. Mining Bitcoin arguably could be, because the ability to make transactions has some value, but the practical value of those transactions is less than the value of the electricity, computer hardware, and pollution that go into making them. Speculating on Bitcoin does nothing productive; it's zero sum. Net-zero systems are nearly indistinguishable from gambling unless you have insider information.
One that comes to mind especially for Bitcoin is that it “could” act as a global store of value, independent of any one geopolitical power. Many countries lack stable and non-corrupt currencies, and many people in those countries cannot trust putting large sums of money in their economy, for fear that they will be taken away from them. If BTC stabilizes in value sufficiently, people in those countries could use it as a store of value—like gold, but easier to obtain. Id argue that the idea of having a digital store of value does increase the productivity of the world, because people don’t have to rely on inefficiently hoarding gold, or paying fees for buying gold in the stock market.
Of course, it's very unlikely that anybody in this thread bought them because in reality we are looking for gains correlated to hype/market performance/inflation/interest.
It seems to me the only difference is whether the speaker is predisposed to not like the thing in question.
This leaves you with a surprisingly small amount of assets. Collectibles probably.
I think the epitome of greater fool is probably NFTs. Unlike a real piece of art you don't actually own anything unless additional value is conferred to you by owning it from the issuing entity, like say legal copyright over the referenced piece in question (if its art).
What is it that you actually own when you buy a physical art piece? Is it the actual canvas and the paint on top? If so then that is definitely not worth hundreds of thousands of dollars on its own. Or, more likely, is it the fact that you own the original, and that the artists could never make an exact replica, unlike with NFTs? Even though you can make an exact replica with NFTs, everybody agrees on the original, and therefore the exact replica has no value. With art you could make a near perfect replica, but everybody would still agree upon the original, and therefore the original is the one with real value. IMO NFTs and physical art are still very similar.
i.e your dumb ape picture could now suddenly become furry porn.
Real art (assuming proper steps to preserve and protect it) will remain as it was while it's in your care. You -own- it, you can take it where you please, store it how you please, etc.
NFTs aren't like real-art at all, they are at best analogous to in-game collectibles - entirely subject to ToS but even those are less predatory and ponzi-like than NFTs.
If you're referring to stocks and bonds, those can have objective value in the form of dividends and coupons.
Don't gamble. It's not a productive use of your time. It's also a vice. Spend your time doing something that is valuable and productive. Don't fritter it away or one day you will probably regret it.
The value at any point in time is determined on the exchanges. I think a better question is what changes the value, creates the volatility, and so forth.
The value is the net benefit (including future benefit) that it provides.
McDonalds creates value by providing convenient and consistent hamburgers, and entry-level jobs.
Bitcoin, I've been told, creates value by allowing easy transfer of funds. Thus the value of Bitcoin should be based on how Bitcoin transaction costs and externalities (lack of regulation is both a plus and a minus) stack up against other money transfer systems.
Your second part there gives a very good hint to your problem in the first part. Of course, in some sense there is some value in facilitating child porn and other illegal activities and some value in burning fossil fuels for mining (the value may be positive or negative). I am still pretty confident that if you just round "actual value" to zero - and use the possible error to keep you away from shorting the market - that is in the long run the valuation that gives you the best quality of life.